There is a few techniques to hang things on a wall, but instead of explain them to you I will link to a couple good kits that can be bought locally. I will also link to a couple good articles and videos on how to hang pictures on a wall. This may seem minor, but the damage can be expensive. So with a little time, the correct tools, and materials you can prevent the aggrevation and additional cost of hanging that beautiful piece of artwork.
A hanging kit from home depot
Walmart’s picture hanging strips
http://www.walmart.com/ip/Command-Medium-Picture-Hanging-Strips-White-4-Sets-Pkg/32887443
Tutorial on to use the strips
http://www.command.com/wps/portal/3M/en_US/NACommand/Command/Smart-Ideas/Picture-Hanging/
How to use the kit to hang a picture